Question

(b) Zinc can easily displace hydrogen from dilute sulphuric acid, but copper cannot. Explain.​

Answer 1

Zinc lies above hydrogen whereas copper lies below hydrogen in the electrochemical series. Hence, zinc is more reactive than H+ whereas copper is less reactive. Therefore, zinc reacts with dilute H2O but copper cannot liberate H2 gas by reaction with dilute H2SO4.

Answer 2

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Answer:

This is because zinc is more reactive than hydrogen which was the cause for the displacement of hydrogen from dilute sulphuric acid. But when copper react with dilute sulphuric acid hydrogen is not liberated, this is because copper is not reactive than hydrogen.

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